Meaning of noise (what is it, concept and definition)

What is Noise:

Noise is an inarticulate or confused sound that usually causes an unpleasant hearing sensation. In the area of ​​telecommunications, 'noise' is a disturbance or abnormal signal that occurs in a telecommunication system, which impairs transmission and prevents information from reaching it clearly.

This word is also used to refer to an uproar. Likewise, this term refers to the stir or strangeness that something causes. It comes from the Latin rugĭtus .

Types of noise

Depending on the variability of the emission peak, three types of noise can be distinguished: continuous, intermittent and impact. Another way of classifying sounds distinguishes between white noise, pink noise, and brown noise.

Depending on the origin of the noise, the noises can be classified as: ambient (made up of various sounds from the environment in which one in particular does not stand out), specific (identifiable and associated with a single source) and initial (sound prior to modification).).

White noise

The white noise or sound white is a type of signal randomness and no statistical correlation between values at two different times. This type of noise has all the frequencies and its power is constant (the density power of the spectrum is flat). Some examples of white noise could be the sound produced by a running vacuum cleaner, a hair dryer. It owes its name by association with the concept of 'white light'.

Industrial noise

The industrial noise is that produced by human activities in this sector. It is produced, for example, in the operation of machinery in production processes such as in the metallurgy sector. Industrial noise is not only an occupational hazard that can affect workers, but can also cause disturbances and discomfort to the nearby population (for example in a town where there is a factory) and also to the surrounding fauna.

In many countries there is legislation that regulates industrial noise to avoid related problems. Some of them have to do, for example, with the use of protective equipment by workers or with the acoustic insulation of certain premises.

Difference between noise and sound

In a generic way, it can be said that the term 'sound' is broader than that of 'noise' since a noise is a type of sound that produces unpleasant sensations. From the point of view of Physics, noise differs from sound in that the former is irregular and there is no agreement between the fundamental tones and their harmonics, whereas in sound it does exist.